We rely heavily on email as the most efficient and accurate way to serve our customers. Please only contact us by PHONE if you are unable to email for some reason, or if your situation (or tech question) is complicated.

We do NOT offer "formal" phone hours, but instead RETURN ALL MESSAGES (usually within 1-2 business days) at a time when we are able to focus on your situation/questions and aren't preoccupied with the flurry of shipments that we are shipping to waiting customers in the busy part of our day. We return calls DURING THE DAY at various times throughout the week as time allows, so please be prepared to wait a few days for us to call you back. If you are phoning for status of a backorder or order in process, you may receive your reply by EMAIL.

This product is JUST the muffler from the collector outward. The header is NOT INCLUDED, and must be purchased separately.

Additional Photos

A-1 Performance Sidewinder MUFFLER, Fits SWHT112-SWHT158 Heater Box Sidewinder Header, Bay Window Bus, Turned Down Tailpipe offers a 2 1/2" Hi-Flo straight through core design for busses. This is slightly louder than the OTB (Out The Back) muffler. If you are looking at buying an A-1 product, it's obvious you value quality and want the BEST! Every A-1 exhaust product is hand made to order by a master exhaust system craftsman to the custom specs you submit for YOUR car!

The front of the muffler on this product is moved inward for maximum clearance to the right rear tire.

THIS MUFFLER ONLY FITS THE FLANGED HEATER BOXER SIDEWINDER VERSION!

A-1's Competition Sidewinder Muffler uses A-1's exclusive 'magna flo' muffler design built to A1's specifications. Note the muffler end cap are located on the same end cap for the most versitile fitment. This design allows a clean and even exhaust note while achieving a noise level under 90 decibels (sound levels may vary due to engine horsepower). Furthermore, these mufflers have A-1s "Venturi Power Cone", that was pioneered by A-1 over 20 years ago. This is a smooth transition from the collector outlet to the muffler core size, which produces power levels through a muffler that are normally not achieved unless you have a stinger!

The maximum ground clearance this muffler has is simply icing on the cake to it's performance!

A-1's mufflers are hand-built with Heavy Duty steel, not that paper thin junk! Are you sick of flanges that are warped out of the box, or that bend during normal exhaust tightening? End THAT once and for all with these Double Thick Tru Flat 3/8" collector flanges that are so straight you don't even need gaskets if you don't want to use them!

Once you've decided on the A-1 Performance Header and muffler that is right for you, don't forget to check out the related products below for compatible A-1 products to build the ultimate exhaust system for your ride!

Base Price $249.95

Country of Manufacture or Origin: Made in USAPN:A-1-HT-LT-BUS

Choose Exhaust Finish / Coating

Ceramic Coating is a life EXTENDER, not a lifetime coating. In other words, you should expect the coating to make the pipes last longer than normal but don't expect the coating to be shiny or to last forever. Normal lifespan varies according to where you live and if you drive the car in the winter in the salt zones. Salt zone, daily driver summer and winter the systems should last about 4 to 5 years normally.

Choose Collector Flange

The V-band Clamp Collector Flange option is a single Band-Clamp that holds the stinger or muffler to the header's collector. It's smaller and cleaner looking, and much faster to connect and disconnect, than the traditional 3-bolt collectors. YOU MUST ADD THE V-BAND OPTION TO BOTH YOUR MUFFLER AND HEADER TO GET A COMPLETE V-BAND SYSTEM. The upgrade fee of $60 is ONLY for one side.

Muffler Exit Size:

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Custom Made Item Agreement

I AGREE TO THE CUSTOM ORDER TERMS FOR THIS ITEM.

CUSTOM MADE TO ORDER ITEM TERMS AND CONDITIONSA-1 Performance Exhaust products are CUSTOM BUILT TO ORDER. You are charged for Custom Made To Order items in advance of shipment, usually within 1-2 business days of order submission. However, time until shipment will be AT LEAST 3 weeks, and may be longer to allow time for manufacture, coating (if applicable), and shipping time in transit. There is no guarantee on timeframe of delivery, but typically A-1 products are done and shipped within 3-6 weeks. Your A-1 items will ship to you separately from your other requested items, and via UPS Ground regardless of the shipping method you select at time of order. US Postal Service shipment and International Shipment is only available by special arrangement (and may be subject to an additional surcharge).There are NO CANCELLATIONS, NO RETURNS and NO REFUNDS/EXCHANGES on A-1 Performance Exhaust products except at the sole discretion of Aircooled.Net. Any issues must be reported within 48 hours of receipt of your product.

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Product Overview

More Info

A-1 Performance Sidewinder MUFFLER, Fits SWHT112-SWHT158 Heater Box Sidewinder Header, Bay Window Bus, Turned Down Tailpipe offers a 2 1/2" Hi-Flo straight through core design for busses. This is slightly louder than the OTB (Out The Back) muffler. If you are looking at buying an A-1 product, it's obvious you value quality and want the BEST! Every A-1 exhaust product is hand made to order by a master exhaust system craftsman to the custom specs you submit for YOUR car!

THIS MUFFLER ONLY FITS THE FLANGED HEATER BOXER SIDEWINDER VERSION!

The front of the muffler on this product is moved inward for maximum clearance to the right rear tire.

They are designed with a design pioneered by A-1 over 20 years ago, the "Venturi Power Cone"! This is a transition from the collector outlet to the muffler core size, which produces power equal to an open stinger, but through the muffler!

PLEASE NOTE: Product availability can vary and short-term backorders are common. Immediate shipment of requested products is NOT guaranteed. Orders are processed in the order that they are received and order fulfillment time varies. Product Images are representative only. Actual product may differ in appearance. Although every effort has been made to provide accurate pricing and product technical and vehicle application information, THIS CATALOG MAY CONTAIN ERRORS (typographical, photographic, or informational). Product prices are subject to change without obligation. In most cases we are able to honor advertised price, but in the RARE case a substantial price increase occurs, you would be notified and given the option to cancel. All information provided by Aircooled.Net (via website or email) is for USE AT YOUR OWN RISK. All products purchased should be checked and installed by a qualified mechanic. Since Aircooled.Net has no control over product installation, we will not be held liable for any consequential costs or damages associated with products purchased.

Aircooled.Net, Inc. is in no way affiliated or associated with Volkswagen AG or Volkswagen ("VW") of America. The use of VW, Volkswagen and any model names and numbers is for the sole purpose of description of parts application. The use of these terms in no way denotes or infers a direct or indirect connection between Aircooled.Net, Inc. and Volkswagen or any of its subsidiaries.
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